1. Best radiograph to view fracture of condyle isOccipitomental viewReverse towne's viewSubmentovertexOPGQuestion 1 of 20 2. Beaten metal appearance of skull from insideMultiple myelomaCrouzon syndromeApert syndromeRicketsQuestion 2 of 20 3. X ray equipment is cleaned /disinfected withSodium hypochloriteBetadineIodoformChlorhexidineQuestion 3 of 20 4. In case of nasal fracture the following radiograph is usedLateral skull viewSubmentovertex viewTransorbital viewOPGQuestion 4 of 20 5. Which of these structures hinders in imaging the root of maxillary molarspalatine boneZygoma and zygomatic process of maxillaOrbital process of zygomaMaxillary sinusQuestion 5 of 20 6. The radiosensitivity of cells depends on ____.All of the aboveMitotic activityDegree of differentiationMitotic futureQuestion 6 of 20 7. A first-year dental student helping out in the clinic for the first time repeatedly obtains x-rays of tooth #14 with a zigzagged pattern. What could have prevented the zigzagged pattern on the radiographic image?Bending the film less when placing in positionTelling the patient not to move during the exposureUsing the film only once instead of exposing it multiple timesPlacing the film incorrectly with the lead portion facing the coneQuestion 7 of 20 8. Bone death in radiation seen after radiation level of50 Gy30 Gy40 Gy20 GyQuestion 8 of 20 9. Photoelectric interactions are highest in _____.DentinPulpEnamelCementumQuestion 9 of 20 10. Hurter Driffield Index is used to measureradiographDental cariesNiTi instrumentStainless steelQuestion 10 of 20 11. In cone beam CT scan what is the artifact seen when the size of the object being imaged is smaller than the voxel sizeDistortionBeam hardeningStreakingPartial volume averagingQuestion 11 of 20 12. Which of the following projections is the best for evaluating midface fractures?ReverseTowne projectionLateral jaw projectionWaters projectionSubmentovertex projectionQuestion 12 of 20 13. During radiographic imaging, predominant X-rays are produced by:Photoelectric effectCoherent scatteringBremstrahlung radiationCompton scatteringQuestion 13 of 20 14. All of the following cells in the body are relatively resistant to damage by radiation exceptMucosal cellsMuscle cellsMature boneNerve cellsQuestion 14 of 20 15. Oxygen deficient cells areRadiosensitive tissueAnticollagenase activityRadioresistantNo effect of oxygen levelQuestion 15 of 20 16. If an unwrapped, nonprocessed x-ray film is exposed to normal light for just a second and then processed, it ______.May still be used but will be a little lightMay still be used but will be a little darkWill be completely blackMay still be used but will be brownQuestion 16 of 20 17. a patient sustains an injury to mandible. Which is the best projection for evaluation of the condylar neck and ramus areaWaterslateral cephReverse towneSubmentovertexQuestion 17 of 20 18. The first electron donor in a developer solution isHydroquinoneSodium bicarbonatePotassium bromidePhenidoneQuestion 18 of 20 19. Proper radiographic infection control includes all of the following except one. Which one is the exception?Disinfecting x-ray machine surfaceCovering working surfaces with barriersWearing gloves while making radiographsSterilizing film packetsQuestion 19 of 20 20. Which of the following projections is the best for evaluating the maxillary sinus?Reverse Towne projectionWaters projectionLateral jaw projectionSubmentovertex projectionQuestion 20 of 20 Loading...